Tungsten Copper Switch Contact
1. What's Tungsten Copper Switch Contact?
Tungsten copper switch contact is an electrical contact component used in switching equipment, particularly at positions exposed to electrical arcs during circuit interruption. It is typically made from tungsten and copper through powder metallurgy and copper infiltration, combining tungsten's high melting point and arc erosion resistance with copper's electrical and thermal conductivity. This composite structure helps reduce contact wear, resist welding, and maintain reliable electrical performance during repeated switching operations.
2. Characteristics of CTIA's Tungsten Copper Switch Contact
(1) Strong arc-ablation resistance, less material loss: High melting point of tungsten effectively resists arc erosion and markedly lowers surface material loss from repeated interruption.
(2) Good conductivity and heat dissipation for controlled temperature rise: Copper ensures smooth current flow and rapid heat dissipation, effectively cutting resistance loss and local overheating.
(3) Anti-welding for reliable interruption: Tungsten phase limits molten-metal adhesion and significantly reduces welding risk under high temperature and high current.
(4) Sweat effect relieving thermal shock: At high temperature copper melts and evaporates, carrying away heat and effectively easing thermal shock on contact surface.
(5) High-temperature stability with good wear resistance: Tungsten raises high-temperature stability and hardness, helping contact better withstand thermal shock and mechanical wear during repeated make-and-break.
(6) Adjustable performance through optional ratios: Higher tungsten content strengthens ablation resistance while conductivity decreases. Ratio can be selected flexibly according to interruption current and actual operating condition.
3. Applications of CTIA's Tungsten Copper Switch Contact
(1) Circuit Breaker Contacts: Used as moving and fixed arcing contacts or arcing contact inserts in high- and medium-voltage circuit breakers, withstanding arc erosion and thermal shock during current interruption.
(2) Load Switch Contacts: Used as arcing contacts in high- and medium-voltage load switches, withstanding arc exposure during load switching operations.
(3) Gas-Insulated Switchgear Contacts: Used in arcing contact assemblies for gas-insulated switchgear, meeting arc erosion resistance requirements during current interruption.
(4) Transformer On-Load Tap Changer Contacts: Used in specific contacts or arc-exposed positions in on-load tap changers, depending on switch design and material selection.
4. Specifications of CTIA's Tungsten Copper Switch Contact
(1) Common Materials: W70Cu, W75Cu, W80Cu, W85Cu, W90Cu, etc.
(2) Product Shapes: Discs, cylinders, rings, and custom-shaped contacts.
(3) Dimensions and Tolerances: Customizable.
With nearly 30 years of experience in tungsten copper alloy manufacturing, CTIA GROUP brings extensive expertise in powder metallurgy and precision machining to production of switch contacts. CTIA provides customized solutions based on switching equipment type, operating conditions, and contact structure, covering material selection, structural design, dimensional customization, and precision machining.
For any inquiry, please contact tungsten copper manufacturer: CTIA GROUP
Email: sales@chinatungsten.com
Tel: 0086 592 5129696 / 0086 592 5129595
Website: tungsten-copper.com
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